908 Devices Inc. (MASS): Insider Trades and Fund Holdings
In the past 12 months, 908 Devices Inc. insiders reported 0 open-market purchases worth $0 and 14 sales worth $2.45M; 9 of the sales were reported as made under a 10b5-1 trading plan.
Timeline: news and trades
Company filings (8-K), insider trades, notices of planned sales (Form 144) and fund moves in the past year, newest first.
- Oct 7, 2026Insider saleDirector Christopher D. Brown sold $356,700 under a 10b5-1 plan
- Oct 6, 2026Insider saleCFO Joseph H. Griffith IV sold $65,150 under a 10b5-1 plan
- Oct 6, 2026Planned saleJoseph Griffith (officer) filed notice to sell about $64,000 around Oct 6, 2026
- Sep 29, 2026Insider sale10% owner Awm Investment Company, Inc. sold $207,322
- Sep 24, 2026Insider sale10% owner Awm Investment Company, Inc. sold $272,626
- Sep 23, 2026Insider sale10% owner Awm Investment Company, Inc. sold $11,250
- Sep 17, 2026Insider saleSVP John Kenneweg sold $53,727 under a 10b5-1 plan
- Sep 16, 2026Insider saleSVP John Kenneweg sold $216,344 under a 10b5-1 plan
- Sep 15, 2026Insider saleSVP John Kenneweg sold $10,000 under a 10b5-1 plan
- Sep 15, 2026Planned saleJohn Kenneweg (officer) filed notice to sell about $269,093 around Sep 15, 2026
- Sep 2, 2026Insider saleDirector Christopher D. Brown sold $317,400 under a 10b5-1 plan
- Aug 25, 2026Insider saleCFO Joseph H. Griffith IV sold $125,476 under a 10b5-1 plan
- Aug 21, 2026Insider sale10% owner Awm Investment Company, Inc. sold $441,159
- Aug 20, 2026Insider sale10% owner Awm Investment Company, Inc. sold $88,638
- Aug 17, 2026Insider saleCEO Kevin J. Knopp sold $207,000 under a 10b5-1 plan
- Aug 13, 2026Insider saleCEO Kevin J. Knopp sold $76,677 under a 10b5-1 plan
- Jun 30, 2026FundRenaissance Technologies cut 17% in Q2 2026 (13F filed Aug 13, 2026)
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Oct 9, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Oct 9 | Christopher D. BrownDirector | ▼ SELL10b5-1 | $357K |
| Oct 8 | Joseph H. Griffith IVCFO | ▼ SELL10b5-1 | $65K |
| Oct 1 | Awm Investment Company, Inc.10% owner | ▼ SELL | $207K |
| Sep 25 | Awm Investment Company, Inc.10% owner | ▼ SELL | $273K |
| Sep 25 | Awm Investment Company, Inc.10% owner | ▼ SELL | $11K |
| Sep 17 | John KennewegSVP | ▼ SELL10b5-1 | $216K |
| Sep 17 | John KennewegSVP | ▼ SELL10b5-1 | $54K |
| Sep 17 | John KennewegSVP | ▼ SELL10b5-1 | $10K |
| Sep 4 | Christopher D. BrownDirector | ▼ SELL10b5-1 | $317K |
| Aug 27 | Joseph H. Griffith IVCFO | ▼ SELL10b5-1 | $125K |
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Christopher D. Brown | Director | 0 | $0 | 2 | $674K |
| Joseph H. Griffith IV | CFO | 0 | $0 | 2 | $191K |
| Awm Investment Company, Inc. | 10% owner | 0 | $0 | 5 | $1.02M |
| John Kenneweg | SVP | 0 | $0 | 3 | $280K |
| Kevin J. Knopp | CEO | 0 | $0 | 2 | $284K |
Buybacks and executive pay
| Year | CEO pay reported | CEO pay "actually paid" | Value of $100 invested |
|---|---|---|---|
| 2025 | $1.55M | $3.05M | n/a |
| 2024 | $1.99M | $29K | n/a |
From the company's XBRL data filed with the SEC. "Actually paid" is the SEC's pay-versus-performance measure, which counts changes in the value of stock awards. "Value of $100 invested" is the company's cumulative shareholder return as reported, usually measured from five years earlier. See all buybacks and CEO pay across companies.
Tracked funds that report MASS
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Renaissance Technologies | 191,900 | $1.67M | ▼ −16.6% |
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →